Tim1

void vTim1_Config(void){
  CLK->PCKENR1|=CLK_PCKENR1_TIM1;//ENABLE CLOCKING
  TIM1->CCMR1|=(1<<0);//CC1 channel is configured as input, IC1 is mapped on TI1FP1
  TIM1->CCER1|=TIM1_CCER1_CC1E;
  TIM1->IER|=TIM1_IER_CC1IE;
  TIM1->CR1|=TIM1_CR1_CEN;
}